402251020434 has 16 divisors (see below), whose sum is σ = 893891156640. Its totient is φ = 134083673460.

The previous prime is 402251020421. The next prime is 402251020453. The reversal of 402251020434 is 434020152204.

402251020434 is a `hidden beast` number, since 4 + 0 + 225 + 1 + 0 + 2 + 0 + 434 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 402251020398 and 402251020407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3724546432 + ... + 3724546539.

It is an arithmetic number, because the mean of its divisors is an integer number (55868197290).

Almost surely, 2^402251020434 is an apocalyptic number.

402251020434 is an abundant number, since it is smaller than the sum of its proper divisors (491640136206).

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

402251020434 is a wasteful number, since it uses less digits than its factorization.

402251020434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7449092982 (or 7449092976 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 402251020434 its reverse (434020152204), we get a palindrome (836271172638).

The spelling of 402251020434 in words is "four hundred two billion, two hundred fifty-one million, twenty thousand, four hundred thirty-four".