72049449 has 8 divisors (see below), whose sum is σ = 98110080. Its totient is φ = 47010896.

The previous prime is 72049447. The next prime is 72049457. The reversal of 72049449 is 94494027.

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 72049449 - 2¹ = 72049447 is a prime.

It is a super-2 number, since 2×72049449² = 10382246202407202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72049441) 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, 255354 + ... + 255635.

It is an arithmetic number, because the mean of its divisors is an integer number (12263760).

Almost surely, 2^72049449 is an apocalyptic number.

It is an amenable number.

72049449 is a deficient number, since it is larger than the sum of its proper divisors (26060631).

72049449 is a wasteful number, since it uses less digits than its factorization.

72049449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511039.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 72049449 is about 8488.1946843837. The cubic root of 72049449 is about 416.1119817646. Note that the first 3 decimals are identical.

It can be divided in two parts, 7204 and 9449, that added together give a triangular number (16653 = T₁₈₂).

The spelling of 72049449 in words is "seventy-two million, forty-nine thousand, four hundred forty-nine".