1366400031 has 16 divisors (see below), whose sum is σ = 1904017920. Its totient is φ = 869980320.

The previous prime is 1366400023. The next prime is 1366400069. The reversal of 1366400031 is 1300046631.

It is not a de Polignac number, because 1366400031 - 2³ = 1366400023 is a prime.

It is a super-2 number, since 2×1366400031² = 3734098089433601922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1366399974 and 1366400010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366400011) 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, 30630 + ... + 60588.

It is an arithmetic number, because the mean of its divisors is an integer number (119001120).

Almost surely, 2^1366400031 is an apocalyptic number.

1366400031 is a deficient number, since it is larger than the sum of its proper divisors (537617889).

1366400031 is a wasteful number, since it uses less digits than its factorization.

1366400031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30646.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1366400031 is about 36964.8485861906. The cubic root of 1366400031 is about 1109.6668726819. Note that the first 3 decimals are identical.

Adding to 1366400031 its reverse (1300046631), we get a palindrome (2666446662).

The spelling of 1366400031 in words is "one billion, three hundred sixty-six million, four hundred thousand, thirty-one".