72279987 has 8 divisors (see below), whose sum is σ = 103786704. Its totient is φ = 44479968.

The previous prime is 72279979. The next prime is 72280037. The reversal of 72279987 is 78997227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72279987 - 2³ = 72279979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72279587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926628 + ... + 926705.

It is an arithmetic number, because the mean of its divisors is an integer number (12973338).

Almost surely, 2^72279987 is an apocalyptic number.

72279987 is a deficient number, since it is larger than the sum of its proper divisors (31506717).

72279987 is a wasteful number, since it uses less digits than its factorization.

72279987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853349.

The product of its digits is 889056, while the sum is 51.

The square root of 72279987 is about 8501.7637581857. The cubic root of 72279987 is about 416.5553230667. Note that the first 3 decimals are identical.

The spelling of 72279987 in words is "seventy-two million, two hundred seventy-nine thousand, nine hundred eighty-seven".