72378240 has 256 divisors, whose sum is σ = 264384000. Its totient is φ = 16670720.

The previous prime is 72378233. The next prime is 72378283. The reversal of 72378240 is 4287327.

72378240 = T₁₇₇₁ + T₁₇₇₂ + ... + T₁₈₁₅.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485686 + ... + 485834.

It is an arithmetic number, because the mean of its divisors is an integer number (1032750).

Almost surely, 2^72378240 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 72378240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132192000).

72378240 is an abundant number, since it is smaller than the sum of its proper divisors (192005760).

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

72378240 is a wasteful number, since it uses less digits than its factorization.

72378240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 72378240 is about 8507.5401850359. The cubic root of 72378240 is about 416.7439842297.

The spelling of 72378240 in words is "seventy-two million, three hundred seventy-eight thousand, two hundred forty".