72028398 has 16 divisors (see below), whose sum is σ = 155138256. Its totient is φ = 22162560.

The previous prime is 72028379. The next prime is 72028403. The reversal of 72028398 is 89382027.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461643 + ... + 461798.

It is an arithmetic number, because the mean of its divisors is an integer number (9696141).

Almost surely, 2^72028398 is an apocalyptic number.

72028398 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

72028398 is an abundant number, since it is smaller than the sum of its proper divisors (83109858).

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

72028398 is a wasteful number, since it uses less digits than its factorization.

72028398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923459.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 72028398 is about 8486.9545774677. The cubic root of 72028398 is about 416.0714520697.

The spelling of 72028398 in words is "seventy-two million, twenty-eight thousand, three hundred ninety-eight".