78374520 has 192 divisors, whose sum is σ = 304106400. Its totient is φ = 17902080.

The previous prime is 78374507. The next prime is 78374531. The reversal of 78374520 is 2547387.

It is a super-2 number, since 2×78374520² = 12285130770460800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 52180 + ... + 53660.

Almost surely, 2^78374520 is an apocalyptic number.

78374520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78374520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152053200).

78374520 is an abundant number, since it is smaller than the sum of its proper divisors (225731880).

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

78374520 is a wasteful number, since it uses less digits than its factorization.

78374520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515 (or 1498 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 78374520 is about 8852.9384952116. The cubic root of 78374520 is about 427.9486210780.

The spelling of 78374520 in words is "seventy-eight million, three hundred seventy-four thousand, five hundred twenty".