70447540 has 24 divisors (see below), whose sum is σ = 148925952. Its totient is φ = 27991200.

The previous prime is 70447537. The next prime is 70447567. The reversal of 70447540 is 4574407.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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, 8644 + ... + 14683.

It is an arithmetic number, because the mean of its divisors is an integer number (6205248).

Almost surely, 2^70447540 is an apocalyptic number.

It is an amenable number.

70447540 is an abundant number, since it is smaller than the sum of its proper divisors (78478412).

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

70447540 is a wasteful number, since it uses less digits than its factorization.

70447540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23487 (or 23485 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 31.

The square root of 70447540 is about 8393.3032829751. The cubic root of 70447540 is about 413.0049695810.

The spelling of 70447540 in words is "seventy million, four hundred forty-seven thousand, five hundred forty".