49621440 has 224 divisors, whose sum is σ = 177905664. Its totient is φ = 11612160.

The previous prime is 49621399. The next prime is 49621447. The reversal of 49621440 is 4412694.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 49621398 and 49621407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49621447) 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, 390657 + ... + 390783.

Almost surely, 2^49621440 is an apocalyptic number.

49621440 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 49621440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88952832).

49621440 is an abundant number, since it is smaller than the sum of its proper divisors (128284224).

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

49621440 is a wasteful number, since it uses less digits than its factorization.

49621440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 49621440 is about 7044.2487179259. The cubic root of 49621440 is about 367.4710421905.

The spelling of 49621440 in words is "forty-nine million, six hundred twenty-one thousand, four hundred forty".