39977642 has 8 divisors (see below), whose sum is σ = 63493956. Its totient is φ = 18812992.

The previous prime is 39977621. The next prime is 39977669. The reversal of 39977642 is 24677993.

It can be written as a sum of positive squares in 2 ways, for example, as 36132121 + 3845521 = 6011^2 + 1961^2 .

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

It is a super-3 number, since 3×39977642³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587873 + ... + 587940.

Almost surely, 2^39977642 is an apocalyptic number.

39977642 is a deficient number, since it is larger than the sum of its proper divisors (23516314).

39977642 is a wasteful number, since it uses less digits than its factorization.

39977642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175832.

The product of its digits is 571536, while the sum is 47.

The square root of 39977642 is about 6322.7875181758. The cubic root of 39977642 is about 341.9314580560.

The spelling of 39977642 in words is "thirty-nine million, nine hundred seventy-seven thousand, six hundred forty-two".