694618740 has 60 divisors (see below), whose sum is σ = 2179049796. Its totient is φ = 185231232.

The previous prime is 694618733. The next prime is 694618751. The reversal of 694618740 is 47816496.

It can be written as a sum of positive squares in 2 ways, for example, as 106750224 + 587868516 = 10332^2 + 24246^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 212769 + ... + 216008.

Almost surely, 2^694618740 is an apocalyptic number.

694618740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

694618740 is an abundant number, since it is smaller than the sum of its proper divisors (1484431056).

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

694618740 is a wasteful number, since it uses less digits than its factorization.

694618740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428798 (or 428787 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 694618740 is about 26355.6206529082. The cubic root of 694618740 is about 885.6228881211.

The spelling of 694618740 in words is "six hundred ninety-four million, six hundred eighteen thousand, seven hundred forty".