1650421440 has 112 divisors (see below), whose sum is σ = 5822350560. Its totient is φ = 440110080.

The previous prime is 1650421417. The next prime is 1650421459. The reversal of 1650421440 is 441240561.

1650421440 is a `hidden beast` number, since 1 + 650 + 4 + 2 + 1 + 4 + 4 + 0 = 666.

1650421440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1650421440² = 5447781859223347200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 86871 + ... + 104150.

Almost surely, 2^1650421440 is an apocalyptic number.

1650421440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1650421440 is an abundant number, since it is smaller than the sum of its proper divisors (4171929120).

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

1650421440 is a wasteful number, since it uses less digits than its factorization.

1650421440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191047 (or 191031 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 1650421440 is about 40625.3792597681. The cubic root of 1650421440 is about 1181.7663482090.

The spelling of 1650421440 in words is "one billion, six hundred fifty million, four hundred twenty-one thousand, four hundred forty".