39999474 has 48 divisors (see below), whose sum is σ = 90770400. Its totient is φ = 13055904.

The previous prime is 39999473. The next prime is 39999499. The reversal of 39999474 is 47499993.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 39999474.

It is not an unprimeable number, because it can be changed into a prime (39999473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287697 + ... + 287835.

It is an arithmetic number, because the mean of its divisors is an integer number (1891050).

Almost surely, 2^39999474 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39999474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45385200).

39999474 is an abundant number, since it is smaller than the sum of its proper divisors (50770926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39999474 is a wasteful number, since it uses less digits than its factorization.

39999474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 217 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 39999474 is about 6324.5137362488. The cubic root of 39999474 is about 341.9936902499.

The spelling of 39999474 in words is "thirty-nine million, nine hundred ninety-nine thousand, four hundred seventy-four".