72349642 has 4 divisors (see below), whose sum is σ = 108524466. Its totient is φ = 36174820.

The previous prime is 72349631. The next prime is 72349657. The reversal of 72349642 is 24694327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24694327 = 7 ⋅3527761.

It can be written as a sum of positive squares in only one way, i.e., 71723961 + 625681 = 8469^2 + 791^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18087409 + ... + 18087412.

Almost surely, 2^72349642 is an apocalyptic number.

72349642 is a deficient number, since it is larger than the sum of its proper divisors (36174824).

72349642 is a wasteful number, since it uses less digits than its factorization.

72349642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36174823.

The product of its digits is 72576, while the sum is 37.

The square root of 72349642 is about 8505.8592746412. The cubic root of 72349642 is about 416.6890892111.

The spelling of 72349642 in words is "seventy-two million, three hundred forty-nine thousand, six hundred forty-two".