70123290 has 32 divisors (see below), whose sum is σ = 169969536. Its totient is φ = 18513600.

The previous prime is 70123267. The next prime is 70123307. The reversal of 70123290 is 9232107.

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

It is a self number, because there is not a number n which added to its sum of digits gives 70123290.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8542 + ... + 14601.

It is an arithmetic number, because the mean of its divisors is an integer number (5311548).

Almost surely, 2^70123290 is an apocalyptic number.

70123290 is an abundant number, since it is smaller than the sum of its proper divisors (99846246).

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

70123290 is a wasteful number, since it uses less digits than its factorization.

70123290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23254.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 70123290 is about 8373.9650106745. The cubic root of 70123290 is about 412.3703467643.

Adding to 70123290 its reverse (9232107), we get a palindrome (79355397).

The spelling of 70123290 in words is "seventy million, one hundred twenty-three thousand, two hundred ninety".