70725420 has 48 divisors (see below), whose sum is σ = 220036320. Its totient is φ = 18859968.

The previous prime is 70725419. The next prime is 70725433. The reversal of 70725420 is 2452707.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 64947 + ... + 66026.

It is an arithmetic number, because the mean of its divisors is an integer number (4584090).

Almost surely, 2^70725420 is an apocalyptic number.

It is an amenable number.

70725420 is an abundant number, since it is smaller than the sum of its proper divisors (149310900).

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

70725420 is a wasteful number, since it uses less digits than its factorization.

70725420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130991 (or 130983 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 70725420 is about 8409.8406643646. The cubic root of 70725420 is about 413.5472892182.

The spelling of 70725420 in words is "seventy million, seven hundred twenty-five thousand, four hundred twenty".