78301040 has 40 divisors (see below), whose sum is σ = 187928448. Its totient is φ = 30309120.

The previous prime is 78301037. The next prime is 78301049. The reversal of 78301040 is 4010387.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×78301040² = 12262105730163200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78300997 and 78301015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78301049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13307 + ... + 18266.

Almost surely, 2^78301040 is an apocalyptic number.

It is an amenable number.

78301040 is an abundant number, since it is smaller than the sum of its proper divisors (109627408).

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

78301040 is a wasteful number, since it uses less digits than its factorization.

78301040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31617 (or 31611 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 78301040 is about 8848.7874875601. The cubic root of 78301040 is about 427.8148382402.

The spelling of 78301040 in words is "seventy-eight million, three hundred one thousand, forty".