78035440 has 120 divisors (see below), whose sum is σ = 223659792. Its totient is φ = 25159680.

The previous prime is 78035431. The next prime is 78035483. The reversal of 78035440 is 4453087.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66055 + ... + 67225.

Almost surely, 2^78035440 is an apocalyptic number.

78035440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78035440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111829896).

78035440 is an abundant number, since it is smaller than the sum of its proper divisors (145624352).

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

78035440 is a wasteful number, since it uses less digits than its factorization.

78035440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 78035440 is about 8833.7670333782. The cubic root of 78035440 is about 427.3305690655.

The spelling of 78035440 in words is "seventy-eight million, thirty-five thousand, four hundred forty".