856707454 has 16 divisors (see below), whose sum is σ = 1353830400. Its totient is φ = 405468504.

The previous prime is 856707451. The next prime is 856707497. The reversal of 856707454 is 454707658.

856707454 = T₂₃₈₉₇ + T₂₃₈₉₈ + T₂₃₈₉₉.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856707451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39789 + ... + 57415.

It is an arithmetic number, because the mean of its divisors is an integer number (84614400).

Almost surely, 2^856707454 is an apocalyptic number.

856707454 is the 23899-th centered triangular number.

856707454 is a deficient number, since it is larger than the sum of its proper divisors (497122946).

856707454 is a wasteful number, since it uses less digits than its factorization.

856707454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18927.

The product of its (nonzero) digits is 940800, while the sum is 46.

The square root of 856707454 is about 29269.5653196285. The cubic root of 856707454 is about 949.7533815979.

The spelling of 856707454 in words is "eight hundred fifty-six million, seven hundred seven thousand, four hundred fifty-four".