402540346788426 has 192 divisors, whose sum is σ = 1161164016230400. Its totient is φ = 97694087299200.

The previous prime is 402540346788389. The next prime is 402540346788449. The reversal of 402540346788426 is 624887643045204.

402540346788426 is a `hidden beast` number, since 4 + 0 + 2 + 5 + 40 + 34 + 67 + 88 + 426 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 160285216 + ... + 162777243.

It is an arithmetic number, because the mean of its divisors is an integer number (6047729251200).

Almost surely, 2^{402540346788426} is an apocalyptic number.

402540346788426 is an abundant number, since it is smaller than the sum of its proper divisors (758623669441974).

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

402540346788426 is a wasteful number, since it uses less digits than its factorization.

402540346788426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323062545 (or 323062542 counting only the distinct ones).

The product of its (nonzero) digits is 247726080, while the sum is 63.

The spelling of 402540346788426 in words is "four hundred two trillion, five hundred forty billion, three hundred forty-six million, seven hundred eighty-eight thousand, four hundred twenty-six".