402857412 has 12 divisors (see below), whose sum is σ = 940000656. Its totient is φ = 134285800.

The previous prime is 402857407. The next prime is 402857417. The reversal of 402857412 is 214758204.

It is an interprime number because it is at equal distance from previous prime (402857407) and next prime (402857417).

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

It is not an unprimeable number, because it can be changed into a prime (402857417) 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, 16785714 + ... + 16785737.

It is an arithmetic number, because the mean of its divisors is an integer number (78333388).

Almost surely, 2^402857412 is an apocalyptic number.

It is an amenable number.

402857412 is an abundant number, since it is smaller than the sum of its proper divisors (537143244).

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

402857412 is a wasteful number, since it uses less digits than its factorization.

402857412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33571458 (or 33571456 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 402857412 is about 20071.3081785916. The cubic root of 402857412 is about 738.5566045046.

The spelling of 402857412 in words is "four hundred two million, eight hundred fifty-seven thousand, four hundred twelve".