2078015688 has 128 divisors (see below), whose sum is σ = 6627532800. Its totient is φ = 590960448.

The previous prime is 2078015663. The next prime is 2078015729. The reversal of 2078015688 is 8865108702.

2078015688 is a `hidden beast` number, since 2 + 0 + 7 + 80 + 1 + 568 + 8 = 666.

It is a super-2 number, since 2×2078015688² = 8636298399148226688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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, 334095 + ... + 340257.

It is an arithmetic number, because the mean of its divisors is an integer number (51777600).

Almost surely, 2^2078015688 is an apocalyptic number.

2078015688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2078015688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3313766400).

2078015688 is an abundant number, since it is smaller than the sum of its proper divisors (4549517112).

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

2078015688 is a wasteful number, since it uses less digits than its factorization.

2078015688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6408 (or 6398 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 2078015688 is about 45585.2573536664. The cubic root of 2078015688 is about 1276.0948049828.

The spelling of 2078015688 in words is "two billion, seventy-eight million, fifteen thousand, six hundred eighty-eight".