78153380 has 48 divisors (see below), whose sum is σ = 169344000. Its totient is φ = 30278400.

The previous prime is 78153373. The next prime is 78153407. The reversal of 78153380 is 8335187.

It is a super-2 number, since 2×78153380² = 12215901610848800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78153380.

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, 156371 + ... + 156869.

It is an arithmetic number, because the mean of its divisors is an integer number (3528000).

Almost surely, 2^78153380 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 78153380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84672000).

78153380 is an abundant number, since it is smaller than the sum of its proper divisors (91190620).

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

78153380 is a wasteful number, since it uses less digits than its factorization.

78153380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 78153380 is about 8840.4400342969. The cubic root of 78153380 is about 427.5457447943.

The spelling of 78153380 in words is "seventy-eight million, one hundred fifty-three thousand, three hundred eighty".