39740290821 has 64 divisors (see below), whose sum is σ = 73471334400. Its totient is φ = 20624803200.

The previous prime is 39740290801. The next prime is 39740290829. The reversal of 39740290821 is 12809204793.

It is not a de Polignac number, because 39740290821 - 2¹³ = 39740282629 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39740290829) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2338726 + ... + 2355656.

It is an arithmetic number, because the mean of its divisors is an integer number (1147989600).

Almost surely, 2^39740290821 is an apocalyptic number.

It is an amenable number.

39740290821 is a deficient number, since it is larger than the sum of its proper divisors (33731043579).

39740290821 is a wasteful number, since it uses less digits than its factorization.

39740290821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18087 (or 18081 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 39740290821 in words is "thirty-nine billion, seven hundred forty million, two hundred ninety thousand, eight hundred twenty-one".