70028920 has 64 divisors (see below), whose sum is σ = 171097920. Its totient is φ = 25641984.

The previous prime is 70028909. The next prime is 70028923. The reversal of 70028920 is 2982007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70028923) 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, 70749 + ... + 71731.

It is an arithmetic number, because the mean of its divisors is an integer number (2673405).

Almost surely, 2^70028920 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 70028920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85548960).

70028920 is an abundant number, since it is smaller than the sum of its proper divisors (101069000).

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

70028920 is a wasteful number, since it uses less digits than its factorization.

70028920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144 (or 1140 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 70028920 is about 8368.3283874380. The cubic root of 70028920 is about 412.1852781527.

The spelling of 70028920 in words is "seventy million, twenty-eight thousand, nine hundred twenty".