78801436 has 24 divisors (see below), whose sum is σ = 165898880. Its totient is φ = 31994352.

The previous prime is 78801431. The next prime is 78801449. The reversal of 78801436 is 63410887.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 78801395 and 78801404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78801431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73530 + ... + 74593.

Almost surely, 2^78801436 is an apocalyptic number.

78801436 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78801436 is an abundant number, since it is smaller than the sum of its proper divisors (87097444).

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

78801436 is a wasteful number, since it uses less digits than its factorization.

78801436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148153 (or 148151 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 78801436 is about 8877.0172918610. The cubic root of 78801436 is about 428.7242446995.

It can be divided in two parts, 7880 and 1436, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 78801436 in words is "seventy-eight million, eight hundred one thousand, four hundred thirty-six".