39400998 has 96 divisors (see below), whose sum is σ = 100931040. Its totient is φ = 10221120.

The previous prime is 39400997. The next prime is 39401017. The reversal of 39400998 is 89900493.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39400997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 645888 + ... + 645948.

It is an arithmetic number, because the mean of its divisors is an integer number (1051365).

Almost surely, 2^39400998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39400998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50465520).

39400998 is an abundant number, since it is smaller than the sum of its proper divisors (61530042).

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

39400998 is a wasteful number, since it uses less digits than its factorization.

39400998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 39400998 is about 6277.0214273969. The cubic root of 39400998 is about 340.2794645782.

The spelling of 39400998 in words is "thirty-nine million, four hundred thousand, nine hundred ninety-eight".