402723363978 has 24 divisors (see below), whose sum is σ = 939687849828. Its totient is φ = 123914881152.

The previous prime is 402723363953. The next prime is 402723363983. The reversal of 402723363978 is 879363327204.

402723363978 is a `hidden beast` number, since 4 + 0 + 272 + 3 + 363 + 9 + 7 + 8 = 666.

402723363978 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 384155758809 + 18567605169 = 619803^2 + 136263^2 .

It is a super-2 number, since 2×402723363978² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 860519775 + ... + 860520242.

Almost surely, 2^402723363978 is an apocalyptic number.

402723363978 is an abundant number, since it is smaller than the sum of its proper divisors (536964485850).

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

402723363978 is a wasteful number, since it uses less digits than its factorization.

402723363978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721040038 (or 1721040035 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 54.

The spelling of 402723363978 in words is "four hundred two billion, seven hundred twenty-three million, three hundred sixty-three thousand, nine hundred seventy-eight".