78039000 has 384 divisors, whose sum is σ = 306633600. Its totient is φ = 17740800.

The previous prime is 78038999. The next prime is 78039001. The reversal of 78039000 is 93087.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78038999) and next prime (78039001).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78039001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2690986 + ... + 2691014.

It is an arithmetic number, because the mean of its divisors is an integer number (798525).

Almost surely, 2^78039000 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 78039000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153316800).

78039000 is an abundant number, since it is smaller than the sum of its proper divisors (228594600).

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

78039000 is a wasteful number, since it uses less digits than its factorization.

78039000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 78039000 is about 8833.9685306209. The cubic root of 78039000 is about 427.3370672826.

The spelling of 78039000 in words is "seventy-eight million, thirty-nine thousand".