1916895240 has 128 divisors (see below), whose sum is σ = 6881212800. Its totient is φ = 471847680.

The previous prime is 1916895217. The next prime is 1916895257. The reversal of 1916895240 is 425986191.

It is a super-2 number, since 2×1916895240² = 7348974722269315200, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 54226 + ... + 82305.

It is an arithmetic number, because the mean of its divisors is an integer number (53759475).

Almost surely, 2^1916895240 is an apocalyptic number.

1916895240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1916895240 is an abundant number, since it is smaller than the sum of its proper divisors (4964317560).

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

1916895240 is a wasteful number, since it uses less digits than its factorization.

1916895240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136564 (or 136554 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 1916895240 is about 43782.3622021471. The cubic root of 1916895240 is about 1242.2226957205. Note that the first 3 decimals are identical.

The spelling of 1916895240 in words is "one billion, nine hundred sixteen million, eight hundred ninety-five thousand, two hundred forty".