2177896842 has 32 divisors (see below), whose sum is σ = 5279751360. Its totient is φ = 659968560.

The previous prime is 2177896837. The next prime is 2177896871. The reversal of 2177896842 is 2486987712.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 1832653 + ... + 1833840.

It is an arithmetic number, because the mean of its divisors is an integer number (164992230).

Almost surely, 2^2177896842 is an apocalyptic number.

2177896842 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2177896842 is an abundant number, since it is smaller than the sum of its proper divisors (3101854518).

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

2177896842 is a wasteful number, since it uses less digits than its factorization.

2177896842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666515 (or 3666509 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 2177896842 is about 46667.9423373262. The cubic root of 2177896842 is about 1296.2211449613.

The spelling of 2177896842 in words is "two billion, one hundred seventy-seven million, eight hundred ninety-six thousand, eight hundred forty-two".