404252540 has 24 divisors (see below), whose sum is σ = 861603792. Its totient is φ = 159287040.

The previous prime is 404252539. The next prime is 404252543. The reversal of 404252540 is 45252404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404252543) 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, 149501 + ... + 152180.

It is an arithmetic number, because the mean of its divisors is an integer number (35900158).

Almost surely, 2^404252540 is an apocalyptic number.

It is an amenable number.

404252540 is an abundant number, since it is smaller than the sum of its proper divisors (457351252).

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

404252540 is a wasteful number, since it uses less digits than its factorization.

404252540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301757 (or 301755 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 404252540 is about 20106.0324281048. The cubic root of 404252540 is about 739.4081827718.

The spelling of 404252540 in words is "four hundred four million, two hundred fifty-two thousand, five hundred forty".