1698772740 has 48 divisors (see below), whose sum is σ = 5436074112. Its totient is φ = 388290816.

The previous prime is 1698772727. The next prime is 1698772807. The reversal of 1698772740 is 472778961.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

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, 2021929 + ... + 2022768.

It is an arithmetic number, because the mean of its divisors is an integer number (113251544).

Almost surely, 2^1698772740 is an apocalyptic number.

1698772740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1698772740 is an abundant number, since it is smaller than the sum of its proper divisors (3737301372).

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

1698772740 is a wasteful number, since it uses less digits than its factorization.

1698772740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044716 (or 4044714 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 51.

The square root of 1698772740 is about 41216.1708556241. The cubic root of 1698772740 is about 1193.1959239291.

The spelling of 1698772740 in words is "one billion, six hundred ninety-eight million, seven hundred seventy-two thousand, seven hundred forty".