72267988 has 12 divisors (see below), whose sum is σ = 136197460. Its totient is φ = 33354432.

The previous prime is 72267983. The next prime is 72267997. The reversal of 72267988 is 88976227.

It can be written as a sum of positive squares in 2 ways, for example, as 9351364 + 62916624 = 3058^2 + 7932^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72267983) 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 3 ways as a sum of consecutive naturals, for example, 694833 + ... + 694936.

Almost surely, 2^72267988 is an apocalyptic number.

It is an amenable number.

72267988 is a deficient number, since it is larger than the sum of its proper divisors (63929472).

72267988 is a wasteful number, since it uses less digits than its factorization.

72267988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389786 (or 1389784 counting only the distinct ones).

The product of its digits is 677376, while the sum is 49.

The square root of 72267988 is about 8501.0580517957. The cubic root of 72267988 is about 416.5322713934.

The spelling of 72267988 in words is "seventy-two million, two hundred sixty-seven thousand, nine hundred eighty-eight".