40398000 has 80 divisors (see below), whose sum is σ = 130262496. Its totient is φ = 10771200.

The previous prime is 40397953. The next prime is 40398013. The reversal of 40398000 is 89304.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

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 15 ways as a sum of consecutive naturals, for example, 2634 + ... + 9366.

Almost surely, 2^40398000 is an apocalyptic number.

40398000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40398000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65131248).

40398000 is an abundant number, since it is smaller than the sum of its proper divisors (89864496).

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

40398000 is a wasteful number, since it uses less digits than its factorization.

40398000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6759 (or 6743 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 40398000 is about 6355.9421016872. The cubic root of 40398000 is about 343.1257319967.

The spelling of 40398000 in words is "forty million, three hundred ninety-eight thousand".