78770340 has 192 divisors, whose sum is σ = 272160000. Its totient is φ = 18754560.

The previous prime is 78770323. The next prime is 78770357. The reversal of 78770340 is 4307787.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78770323) and next prime (78770357).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 78770295 and 78770304.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 528586 + ... + 528734.

It is an arithmetic number, because the mean of its divisors is an integer number (1417500).

Almost surely, 2^78770340 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 78770340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136080000).

78770340 is an abundant number, since it is smaller than the sum of its proper divisors (193389660).

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

78770340 is a wasteful number, since it uses less digits than its factorization.

78770340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 259 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 78770340 is about 8875.2656298277. The cubic root of 78770340 is about 428.6678440221.

The spelling of 78770340 in words is "seventy-eight million, seven hundred seventy thousand, three hundred forty".