72939770 has 16 divisors (see below), whose sum is σ = 134085888. Its totient is φ = 28554960.

The previous prime is 72939767. The next prime is 72939773. The reversal of 72939770 is 7793927.

It is an interprime number because it is at equal distance from previous prime (72939767) and next prime (72939773).

It is not an unprimeable number, because it can be changed into a prime (72939773) 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, 77126 + ... + 78065.

It is an arithmetic number, because the mean of its divisors is an integer number (8380368).

Almost surely, 2^72939770 is an apocalyptic number.

72939770 is a deficient number, since it is larger than the sum of its proper divisors (61146118).

72939770 is a wasteful number, since it uses less digits than its factorization.

72939770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155245.

The product of its (nonzero) digits is 166698, while the sum is 44.

The square root of 72939770 is about 8540.4783238411. The cubic root of 72939770 is about 417.8189466424.

The spelling of 72939770 in words is "seventy-two million, nine hundred thirty-nine thousand, seven hundred seventy".