39872819 has 24 divisors (see below), whose sum is σ = 47983968. Its totient is φ = 33022080.

The previous prime is 39872813. The next prime is 39872821. The reversal of 39872819 is 91827893.

It is not a de Polignac number, because 39872819 - 2⁸ = 39872563 is a prime.

It is a super-2 number, since 2×39872819² = 3179683390013522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39872813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253889 + ... + 254045.

It is an arithmetic number, because the mean of its divisors is an integer number (1999332).

Almost surely, 2^39872819 is an apocalyptic number.

39872819 is a deficient number, since it is larger than the sum of its proper divisors (8111149).

39872819 is a wasteful number, since it uses less digits than its factorization.

39872819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 308 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 39872819 is about 6314.4927745623. The cubic root of 39872819 is about 341.6323437529.

The spelling of 39872819 in words is "thirty-nine million, eight hundred seventy-two thousand, eight hundred nineteen".