2698387840 has 32 divisors (see below), whose sum is σ = 6450834960. Its totient is φ = 1079354880.

The previous prime is 2698387831. The next prime is 2698387891. The reversal of 2698387840 is 487838962.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2107476 + ... + 2108755.

Almost surely, 2^2698387840 is an apocalyptic number.

2698387840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2698387840 is an abundant number, since it is smaller than the sum of its proper divisors (3752447120).

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

2698387840 is an equidigital number, since it uses as much as digits as its factorization.

2698387840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4216250 (or 4216238 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 55.

The square root of 2698387840 is about 51946.0088938505. The cubic root of 2698387840 is about 1392.1994473541.

The spelling of 2698387840 in words is "two billion, six hundred ninety-eight million, three hundred eighty-seven thousand, eight hundred forty".