77877954 has 144 divisors (see below), whose sum is σ = 224078400. Its totient is φ = 19293120.

The previous prime is 77877953. The next prime is 77877959. The reversal of 77877954 is 45977877.

It is a super-2 number, since 2×77877954² = 12129951438452232, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77877954.

It is not an unprimeable number, because it can be changed into a prime (77877953) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 222972 + ... + 223320.

It is an arithmetic number, because the mean of its divisors is an integer number (1556100).

Almost surely, 2^77877954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77877954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112039200).

77877954 is an abundant number, since it is smaller than the sum of its proper divisors (146200446).

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

77877954 is a wasteful number, since it uses less digits than its factorization.

77877954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 395 counting only the distinct ones).

The product of its digits is 3457440, while the sum is 54.

The square root of 77877954 is about 8824.8486672577. The cubic root of 77877954 is about 427.0429053008.

The spelling of 77877954 in words is "seventy-seven million, eight hundred seventy-seven thousand, nine hundred fifty-four".