39900245 has 32 divisors (see below), whose sum is σ = 61330176. Its totient is φ = 24192000.

The previous prime is 39900233. The next prime is 39900277. The reversal of 39900245 is 54200993.

39900245 = T₂₄₉ + T₂₅₀ + ... + T₆₃₃.

It is not a de Polignac number, because 39900245 - 2⁴ = 39900229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 12845 + ... + 15645.

It is an arithmetic number, because the mean of its divisors is an integer number (1916568).

Almost surely, 2^39900245 is an apocalyptic number.

39900245 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

39900245 is a deficient number, since it is larger than the sum of its proper divisors (21429931).

39900245 is a wasteful number, since it uses less digits than its factorization.

39900245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2861.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 39900245 is about 6316.6640721191. The cubic root of 39900245 is about 341.7106549221.

The spelling of 39900245 in words is "thirty-nine million, nine hundred thousand, two hundred forty-five".