50401640 has 32 divisors (see below), whose sum is σ = 113611680. Its totient is φ = 20123712.

The previous prime is 50401639. The next prime is 50401649. The reversal of 50401640 is 4610405.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (50401649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34607 + ... + 36033.

It is an arithmetic number, because the mean of its divisors is an integer number (3550365).

Almost surely, 2^50401640 is an apocalyptic number.

It is an amenable number.

50401640 is an abundant number, since it is smaller than the sum of its proper divisors (63210040).

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

50401640 is a wasteful number, since it uses less digits than its factorization.

50401640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321 (or 2317 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 50401640 is about 7099.4112431947. The cubic root of 50401640 is about 369.3869565808.

The spelling of 50401640 in words is "fifty million, four hundred one thousand, six hundred forty".