39945402 has 48 divisors (see below), whose sum is σ = 100189440. Its totient is φ = 11265696.

The previous prime is 39945397. The next prime is 39945431. The reversal of 39945402 is 20454993.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 23 ways as a sum of consecutive naturals, for example, 7948 + ... + 11960.

It is an arithmetic number, because the mean of its divisors is an integer number (2087280).

Almost surely, 2^39945402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39945402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50094720).

39945402 is an abundant number, since it is smaller than the sum of its proper divisors (60244038).

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

39945402 is a wasteful number, since it uses less digits than its factorization.

39945402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107 (or 4104 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 39945402 is about 6320.2374955376. The cubic root of 39945402 is about 341.8395163740.

The spelling of 39945402 in words is "thirty-nine million, nine hundred forty-five thousand, four hundred two".