78030940 has 24 divisors (see below), whose sum is σ = 176470560. Its totient is φ = 28811328.

The previous prime is 78030919. The next prime is 78030961. The reversal of 78030940 is 4903087.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78030919) and next prime (78030961).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149800 + ... + 150319.

It is an arithmetic number, because the mean of its divisors is an integer number (7352940).

Almost surely, 2^78030940 is an apocalyptic number.

It is an amenable number.

78030940 is an abundant number, since it is smaller than the sum of its proper divisors (98439620).

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

78030940 is a wasteful number, since it uses less digits than its factorization.

78030940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300141 (or 300139 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 78030940 is about 8833.5123252305. The cubic root of 78030940 is about 427.3223547442.

The spelling of 78030940 in words is "seventy-eight million, thirty thousand, nine hundred forty".