78485040 has 120 divisors (see below), whose sum is σ = 268049808. Its totient is φ = 20574720.

The previous prime is 78485027. The next prime is 78485053. The reversal of 78485040 is 4058487.

It is an interprime number because it is at equal distance from previous prime (78485027) and next prime (78485053).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 78484986 and 78485004.

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, 43027 + ... + 44813.

Almost surely, 2^78485040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78485040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134024904).

78485040 is an abundant number, since it is smaller than the sum of its proper divisors (189564768).

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

78485040 is a wasteful number, since it uses less digits than its factorization.

78485040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867 (or 1858 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 78485040 is about 8859.1782914670. The cubic root of 78485040 is about 428.1496841576.

The spelling of 78485040 in words is "seventy-eight million, four hundred eighty-five thousand, forty".