39948513 has 12 divisors (see below), whose sum is σ = 58547664. Its totient is φ = 24211000.

The previous prime is 39948509. The next prime is 39948523. The reversal of 39948513 is 31584993.

It is not a de Polignac number, because 39948513 - 2² = 39948509 is a prime.

It is a super-2 number, since 2×39948513² = 3191767381822338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39948523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54663 + ... + 55388.

It is an arithmetic number, because the mean of its divisors is an integer number (4878972).

Almost surely, 2^39948513 is an apocalyptic number.

39948513 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

39948513 is a deficient number, since it is larger than the sum of its proper divisors (18599151).

39948513 is a wasteful number, since it uses less digits than its factorization.

39948513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110076 (or 110065 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 39948513 is about 6320.4836049151. The cubic root of 39948513 is about 341.8483904461.

The spelling of 39948513 in words is "thirty-nine million, nine hundred forty-eight thousand, five hundred thirteen".