1864054840 has 32 divisors (see below), whose sum is σ = 4206599280. Its totient is φ = 743404032.

The previous prime is 1864054741. The next prime is 1864054901. The reversal of 1864054840 is 484504681.

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 = 1864054793 and 1864054802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55662 + ... + 82621.

Almost surely, 2^1864054840 is an apocalyptic number.

1864054840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1864054840 is an abundant number, since it is smaller than the sum of its proper divisors (2342544440).

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

1864054840 is a wasteful number, since it uses less digits than its factorization.

1864054840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138631 (or 138627 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The square root of 1864054840 is about 43174.7013886605. The cubic root of 1864054840 is about 1230.7019678265.

The spelling of 1864054840 in words is "one billion, eight hundred sixty-four million, fifty-four thousand, eight hundred forty".