78293250 has 128 divisors (see below), whose sum is σ = 248302080. Its totient is φ = 17884800.

The previous prime is 78293249. The next prime is 78293309. The reversal of 78293250 is 5239287.

It is a happy number.

It is a super-2 number, since 2×78293250² = 12259665991125000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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, 46422 + ... + 48078.

It is an arithmetic number, because the mean of its divisors is an integer number (1939860).

Almost surely, 2^78293250 is an apocalyptic number.

78293250 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78293250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124151040).

78293250 is an abundant number, since it is smaller than the sum of its proper divisors (170008830).

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

78293250 is a wasteful number, since it uses less digits than its factorization.

78293250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 78293250 is about 8848.3473033104. The cubic root of 78293250 is about 427.8006503140.

The spelling of 78293250 in words is "seventy-eight million, two hundred ninety-three thousand, two hundred fifty".