1400393939 has 16 divisors (see below), whose sum is σ = 1672688640. Its totient is φ = 1146324960.

The previous prime is 1400393927. The next prime is 1400393941. The reversal of 1400393939 is 9393930041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1400393939 is a prime.

It is a super-2 number, since 2×1400393939² = 3922206368775871442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1400393896 and 1400393905.

It is not an unprimeable number, because it can be changed into a prime (1400393339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99842 + ... + 113000.

It is an arithmetic number, because the mean of its divisors is an integer number (104543040).

Almost surely, 2^1400393939 is an apocalyptic number.

1400393939 is a deficient number, since it is larger than the sum of its proper divisors (272294701).

1400393939 is a wasteful number, since it uses less digits than its factorization.

1400393939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13850.

The product of its (nonzero) digits is 78732, while the sum is 41.

The square root of 1400393939 is about 37421.8377287915. The cubic root of 1400393939 is about 1118.7938596706.

The spelling of 1400393939 in words is "one billion, four hundred million, three hundred ninety-three thousand, nine hundred thirty-nine".