78197460 has 72 divisors (see below), whose sum is σ = 240689568. Its totient is φ = 18955200.

The previous prime is 78197443. The next prime is 78197473. The reversal of 78197460 is 6479187.

It is a super-2 number, since 2×78197460² = 12229685500903200, which contains 22 as substring.

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, 1875 + ... + 12645.

Almost surely, 2^78197460 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 78197460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120344784).

78197460 is an abundant number, since it is smaller than the sum of its proper divisors (162492108).

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

78197460 is a wasteful number, since it uses less digits than its factorization.

78197460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10805 (or 10792 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 78197460 is about 8842.9327714283. The cubic root of 78197460 is about 427.6261110106.

The spelling of 78197460 in words is "seventy-eight million, one hundred ninety-seven thousand, four hundred sixty".