403998312906 has 32 divisors (see below), whose sum is σ = 904843130880. Its totient is φ = 133605739008.

The previous prime is 403998312889. The next prime is 403998312979. The reversal of 403998312906 is 609213899304.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29447671 + ... + 29461386.

It is an arithmetic number, because the mean of its divisors is an integer number (28276347840).

Almost surely, 2^403998312906 is an apocalyptic number.

403998312906 is an abundant number, since it is smaller than the sum of its proper divisors (500844817974).

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

403998312906 is a wasteful number, since it uses less digits than its factorization.

403998312906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58909195 (or 58909189 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The spelling of 403998312906 in words is "four hundred three billion, nine hundred ninety-eight million, three hundred twelve thousand, nine hundred six".