70903920 has 40 divisors (see below), whose sum is σ = 219802896. Its totient is φ = 18907648.

The previous prime is 70903909. The next prime is 70903961. The reversal of 70903920 is 2930907.

It is a tau number, because it is divible by the number of its divisors (40).

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

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, 147477 + ... + 147956.

Almost surely, 2^70903920 is an apocalyptic number.

It is an amenable number.

70903920 is an abundant number, since it is smaller than the sum of its proper divisors (148898976).

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

70903920 is a wasteful number, since it uses less digits than its factorization.

70903920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295449 (or 295443 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 70903920 is about 8420.4465439785. The cubic root of 70903920 is about 413.8949066951.

The spelling of 70903920 in words is "seventy million, nine hundred three thousand, nine hundred twenty".