117777492 has 36 divisors (see below), whose sum is σ = 340246816. Its totient is φ = 33650640.

The previous prime is 117777487. The next prime is 117777493. The reversal of 117777492 is 294777711.

It is a tau number, because it is divible by the number of its divisors (36).

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 a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117777493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233434 + ... + 233937.

Almost surely, 2^117777492 is an apocalyptic number.

117777492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

117777492 is an abundant number, since it is smaller than the sum of its proper divisors (222469324).

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

117777492 is a wasteful number, since it uses less digits than its factorization.

117777492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467388 (or 467383 counting only the distinct ones).

The product of its digits is 172872, while the sum is 45.

The square root of 117777492 is about 10852.5338976665. The cubic root of 117777492 is about 490.1783218801.

The spelling of 117777492 in words is "one hundred seventeen million, seven hundred seventy-seven thousand, four hundred ninety-two".