72281976 has 96 divisors (see below), whose sum is σ = 199221120. Its totient is φ = 21840000.

The previous prime is 72281971. The next prime is 72281981. The reversal of 72281976 is 67918227.

It is an interprime number because it is at equal distance from previous prime (72281971) and next prime (72281981).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72281971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287851 + ... + 288101.

It is an arithmetic number, because the mean of its divisors is an integer number (2075220).

Almost surely, 2^72281976 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 72281976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99610560).

72281976 is an abundant number, since it is smaller than the sum of its proper divisors (126939144).

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

72281976 is a wasteful number, since it uses less digits than its factorization.

72281976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 340 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 72281976 is about 8501.8807331084. The cubic root of 72281976 is about 416.5591439534.

The spelling of 72281976 in words is "seventy-two million, two hundred eighty-one thousand, nine hundred seventy-six".