839880040 has 32 divisors (see below), whose sum is σ = 1890760680. Its totient is φ = 335768832.

The previous prime is 839880023. The next prime is 839880043. The reversal of 839880040 is 40088938.

It can be written as a sum of positive squares in 4 ways, for example, as 425431876 + 414448164 = 20626^2 + 20358^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 839879975 and 839880002.

It is not an unprimeable number, because it can be changed into a prime (839880043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87142 + ... + 96298.

Almost surely, 2^839880040 is an apocalyptic number.

It is an amenable number.

839880040 is an abundant number, since it is smaller than the sum of its proper divisors (1050880640).

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

839880040 is a wasteful number, since it uses less digits than its factorization.

839880040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11461 (or 11457 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 839880040 is about 28980.6839118748. The cubic root of 839880040 is about 943.4938784830.

The spelling of 839880040 in words is "eight hundred thirty-nine million, eight hundred eighty thousand, forty".