49797440 has 224 divisors, whose sum is σ = 154497024. Its totient is φ = 14837760.

The previous prime is 49797421. The next prime is 49797443. The reversal of 49797440 is 4479794.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 49797391 and 49797400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49797443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1059497 + ... + 1059543.

Almost surely, 2^49797440 is an apocalyptic number.

49797440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49797440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77248512).

49797440 is an abundant number, since it is smaller than the sum of its proper divisors (104699584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

49797440 is a wasteful number, since it uses less digits than its factorization.

49797440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 49797440 is about 7056.7301209555. The cubic root of 49797440 is about 367.9049849217.

49797440 divided by its sum of digits (44) gives a triangular number (1131760 = T₁₅₀₄).

The spelling of 49797440 in words is "forty-nine million, seven hundred ninety-seven thousand, four hundred forty".