77994090 has 40 divisors (see below), whose sum is σ = 209719620. Its totient is φ = 20798208.

The previous prime is 77994083. The next prime is 77994101. The reversal of 77994090 is 9049977.

It can be written as a sum of positive squares in 2 ways, for example, as 77951241 + 42849 = 8829^2 + 207^2 .

It is a super-3 number, since 3×77994090³ (a number of 25 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 47335 + ... + 48954.

Almost surely, 2^77994090 is an apocalyptic number.

77994090 is an abundant number, since it is smaller than the sum of its proper divisors (131725530).

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

77994090 is a wasteful number, since it uses less digits than its factorization.

77994090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96308 (or 96299 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 77994090 is about 8831.4262721262. The cubic root of 77994090 is about 427.2550766952.

The spelling of 77994090 in words is "seventy-seven million, nine hundred ninety-four thousand, ninety".