70291920 has 80 divisors (see below), whose sum is σ = 219985920. Its totient is φ = 18565632.

The previous prime is 70291913. The next prime is 70291927. The reversal of 70291920 is 2919207.

It is an interprime number because it is at equal distance from previous prime (70291913) and next prime (70291927).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70291927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24817 + ... + 27503.

It is an arithmetic number, because the mean of its divisors is an integer number (2749824).

Almost surely, 2^70291920 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 70291920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109992960).

70291920 is an abundant number, since it is smaller than the sum of its proper divisors (149694000).

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

70291920 is a wasteful number, since it uses less digits than its factorization.

70291920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812 (or 2806 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 70291920 is about 8384.0276717101. The cubic root of 70291920 is about 412.7006333452.

The spelling of 70291920 in words is "seventy million, two hundred ninety-one thousand, nine hundred twenty".