402820856 has 8 divisors (see below), whose sum is σ = 755289120. Its totient is φ = 201410424.

The previous prime is 402820841. The next prime is 402820871. The reversal of 402820856 is 658028204.

It is an interprime number because it is at equal distance from previous prime (402820841) and next prime (402820871).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25176296 + ... + 25176311.

It is an arithmetic number, because the mean of its divisors is an integer number (94411140).

Almost surely, 2^402820856 is an apocalyptic number.

It is an amenable number.

402820856 is a deficient number, since it is larger than the sum of its proper divisors (352468264).

402820856 is a wasteful number, since it uses less digits than its factorization.

402820856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50352613 (or 50352609 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 402820856 is about 20070.3975047830. The cubic root of 402820856 is about 738.5342645144.

The spelling of 402820856 in words is "four hundred two million, eight hundred twenty thousand, eight hundred fifty-six".