70147920 has 40 divisors (see below), whose sum is σ = 217459296. Its totient is φ = 18706048.

The previous prime is 70147871. The next prime is 70147927. The reversal of 70147920 is 2974107.

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 not an unprimeable number, because it can be changed into a prime (70147927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145902 + ... + 146381.

Almost surely, 2^70147920 is an apocalyptic number.

It is an amenable number.

70147920 is an abundant number, since it is smaller than the sum of its proper divisors (147311376).

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

70147920 is a wasteful number, since it uses less digits than its factorization.

70147920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292299 (or 292293 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 70147920 is about 8375.4355110645. The cubic root of 70147920 is about 412.4186212284.

The spelling of 70147920 in words is "seventy million, one hundred forty-seven thousand, nine hundred twenty".