78107740 has 48 divisors (see below), whose sum is σ = 171410400. Its totient is φ = 29866752.

The previous prime is 78107719. The next prime is 78107761. The reversal of 78107740 is 4770187.

It is an interprime number because it is at equal distance from previous prime (78107719) and next prime (78107761).

It is a super-2 number, since 2×78107740² = 12201638095815200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78107696 and 78107705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42766 + ... + 44554.

It is an arithmetic number, because the mean of its divisors is an integer number (3571050).

Almost surely, 2^78107740 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 78107740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85705200).

78107740 is an abundant number, since it is smaller than the sum of its proper divisors (93302660).

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

78107740 is a wasteful number, since it uses less digits than its factorization.

78107740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894 (or 1892 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 78107740 is about 8837.8583378554. The cubic root of 78107740 is about 427.4625025533.

The spelling of 78107740 in words is "seventy-eight million, one hundred seven thousand, seven hundred forty".