72999970 has 16 divisors (see below), whose sum is σ = 131764608. Its totient is φ = 29118960.

The previous prime is 72999961. The next prime is 72999973. The reversal of 72999970 is 7999927.

It is not an unprimeable number, because it can be changed into a prime (72999973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6276 + ... + 13615.

It is an arithmetic number, because the mean of its divisors is an integer number (8235288).

Almost surely, 2^72999970 is an apocalyptic number.

72999970 is a deficient number, since it is larger than the sum of its proper divisors (58764638).

72999970 is a wasteful number, since it uses less digits than its factorization.

72999970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20265.

The product of its (nonzero) digits is 642978, while the sum is 52.

The square root of 72999970 is about 8544.0019897001. The cubic root of 72999970 is about 417.9338623869.

The spelling of 72999970 in words is "seventy-two million, nine hundred ninety-nine thousand, nine hundred seventy".