1378811400 has 48 divisors (see below), whose sum is σ = 4274317200. Its totient is φ = 367682880.

The previous prime is 1378811389. The next prime is 1378811449. The reversal of 1378811400 is 41188731.

It is a super-2 number, since 2×1378811400² = 3802241753539920000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1148410 + ... + 1149609.

It is an arithmetic number, because the mean of its divisors is an integer number (89048275).

Almost surely, 2^1378811400 is an apocalyptic number.

1378811400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1378811400 is an abundant number, since it is smaller than the sum of its proper divisors (2895505800).

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

1378811400 is a wasteful number, since it uses less digits than its factorization.

1378811400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298038 (or 2298029 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 1378811400 is about 37132.3497775188. The cubic root of 1378811400 is about 1113.0165492478.

The spelling of 1378811400 in words is "one billion, three hundred seventy-eight million, eight hundred eleven thousand, four hundred".