403772988 has 12 divisors (see below), whose sum is σ = 942137000. Its totient is φ = 134590992.

The previous prime is 403772987. The next prime is 403773011. The reversal of 403772988 is 889277304.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403772983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16823863 + ... + 16823886.

Almost surely, 2^403772988 is an apocalyptic number.

It is an amenable number.

403772988 is an abundant number, since it is smaller than the sum of its proper divisors (538364012).

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

403772988 is a wasteful number, since it uses less digits than its factorization.

403772988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33647756 (or 33647754 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The square root of 403772988 is about 20094.1033141566. The cubic root of 403772988 is about 739.1156882368.

It can be divided in two parts, 40377 and 2988, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 403772988 in words is "four hundred three million, seven hundred seventy-two thousand, nine hundred eighty-eight".