70123456 has 56 divisors (see below), whose sum is σ = 151698960. Its totient is φ = 31967232.

The previous prime is 70123439. The next prime is 70123499. The reversal of 70123456 is 65432107.

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

It is a congruent number.

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, 73575 + ... + 74521.

It is an arithmetic number, because the mean of its divisors is an integer number (2708910).

Almost surely, 2^70123456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70123456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75849480).

70123456 is an abundant number, since it is smaller than the sum of its proper divisors (81575504).

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

70123456 is a wasteful number, since it uses less digits than its factorization.

70123456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 70123456 is about 8373.9749223412. The cubic root of 70123456 is about 412.3706721599.

The spelling of 70123456 in words is "seventy million, one hundred twenty-three thousand, four hundred fifty-six".