402520438 has 4 divisors (see below), whose sum is σ = 603780660. Its totient is φ = 201260218.

The previous prime is 402520429. The next prime is 402520457. The reversal of 402520438 is 834025204.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100630108 + ... + 100630111.

It is an arithmetic number, because the mean of its divisors is an integer number (150945165).

Almost surely, 2^402520438 is an apocalyptic number.

402520438 is a deficient number, since it is larger than the sum of its proper divisors (201260222).

402520438 is a wasteful number, since it uses less digits than its factorization.

402520438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201260221.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 402520438 is about 20062.9120020001. The cubic root of 402520438 is about 738.3506227774.

The spelling of 402520438 in words is "four hundred two million, five hundred twenty thousand, four hundred thirty-eight".