1799406540 has 36 divisors (see below), whose sum is σ = 5458200384. Its totient is φ = 479841696.

The previous prime is 1799406517. The next prime is 1799406559. The reversal of 1799406540 is 456049971.

1799406540 is a `hidden beast` number, since 17 + 9 + 94 + 0 + 6 + 540 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 4998172 + ... + 4998531.

Almost surely, 2^1799406540 is an apocalyptic number.

1799406540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1799406540 is an abundant number, since it is smaller than the sum of its proper divisors (3658793844).

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

1799406540 is a wasteful number, since it uses less digits than its factorization.

1799406540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9996718 (or 9996713 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 1799406540 is about 42419.4123014452. The cubic root of 1799406540 is about 1216.3066976199.

The spelling of 1799406540 in words is "one billion, seven hundred ninety-nine million, four hundred six thousand, five hundred forty".