49040640 has 360 divisors, whose sum is σ = 195880608. Its totient is φ = 11612160.

The previous prime is 49040639. The next prime is 49040647. The reversal of 49040640 is 4604094.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49040647) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1140459 + ... + 1140501.

Almost surely, 2^49040640 is an apocalyptic number.

49040640 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 49040640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97940304).

49040640 is an abundant number, since it is smaller than the sum of its proper divisors (146839968).

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

49040640 is a wasteful number, since it uses less digits than its factorization.

49040640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 49040640 is about 7002.9022554938. The cubic root of 49040640 is about 366.0317091581.

The spelling of 49040640 in words is "forty-nine million, forty thousand, six hundred forty".