39142690402 has 4 divisors (see below), whose sum is σ = 58714035606. Its totient is φ = 19571345200.

The previous prime is 39142690399. The next prime is 39142690409. The reversal of 39142690402 is 20409624193.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34298669601 + 4844020801 = 185199^2 + 69599^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (39142690409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9785672599 + ... + 9785672602.

Almost surely, 2^39142690402 is an apocalyptic number.

39142690402 is a deficient number, since it is larger than the sum of its proper divisors (19571345204).

39142690402 is a wasteful number, since it uses less digits than its factorization.

39142690402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19571345203.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 39142690402 in words is "thirty-nine billion, one hundred forty-two million, six hundred ninety thousand, four hundred two".