1918004780 has 48 divisors (see below), whose sum is σ = 4243975680. Its totient is φ = 726107328.

The previous prime is 1918004773. The next prime is 1918004801. The reversal of 1918004780 is 874008191.

It is a super-2 number, since 2×1918004780² = 7357484672205696800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538967 + ... + 542513.

It is an arithmetic number, because the mean of its divisors is an integer number (88416160).

Almost surely, 2^1918004780 is an apocalyptic number.

1918004780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1918004780 is an abundant number, since it is smaller than the sum of its proper divisors (2325970900).

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

1918004780 is a wasteful number, since it uses less digits than its factorization.

1918004780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998 (or 4996 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 1918004780 is about 43795.0314533510. The cubic root of 1918004780 is about 1242.4623245219.

The spelling of 1918004780 in words is "one billion, nine hundred eighteen million, four thousand, seven hundred eighty".