856123402 has 8 divisors (see below), whose sum is σ = 1284688512. Its totient is φ = 427893900.

The previous prime is 856123399. The next prime is 856123403. The reversal of 856123402 is 204321658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (856123403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77424 + ... + 87787.

It is an arithmetic number, because the mean of its divisors is an integer number (160586064).

Almost surely, 2^856123402 is an apocalyptic number.

856123402 is a deficient number, since it is larger than the sum of its proper divisors (428565110).

856123402 is a wasteful number, since it uses less digits than its factorization.

856123402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167804.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 856123402 is about 29259.5864974200. The cubic root of 856123402 is about 949.5375041466.

The spelling of 856123402 in words is "eight hundred fifty-six million, one hundred twenty-three thousand, four hundred two".