72280019 has 8 divisors (see below), whose sum is σ = 82712928. Its totient is φ = 61873920.

The previous prime is 72279979. The next prime is 72280037. The reversal of 72280019 is 91008227.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72280019 - 2⁸ = 72279763 is a prime.

It is a super-2 number, since 2×72280019² = 10448802293280722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72279973 and 72280000.

It is not an unprimeable number, because it can be changed into a prime (72280079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542 + ... + 12035.

It is an arithmetic number, because the mean of its divisors is an integer number (10339116).

Almost surely, 2^72280019 is an apocalyptic number.

72280019 is a deficient number, since it is larger than the sum of its proper divisors (10432909).

72280019 is a wasteful number, since it uses less digits than its factorization.

72280019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13405.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 72280019 is about 8501.7656401479. The cubic root of 72280019 is about 416.5553845395. Note that the first 3 decimals are identical.

The spelling of 72280019 in words is "seventy-two million, two hundred eighty thousand, nineteen".