728787337 has 4 divisors (see below), whose sum is σ = 730690560. Its totient is φ = 726884116.

The previous prime is 728787317. The next prime is 728787347. The reversal of 728787337 is 733787827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 733787827 = 11399 ⋅64373.

It is a cyclic number.

It is not a de Polignac number, because 728787337 - 2¹¹ = 728785289 is a prime.

It is a super-2 number, since 2×728787337² = 1062261965143103138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728787307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 951037 + ... + 951802.

It is an arithmetic number, because the mean of its divisors is an integer number (182672640).

Almost surely, 2^728787337 is an apocalyptic number.

It is an amenable number.

728787337 is a deficient number, since it is larger than the sum of its proper divisors (1903223).

728787337 is a wasteful number, since it uses less digits than its factorization.

728787337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903222.

The product of its digits is 2765952, while the sum is 52.

The square root of 728787337 is about 26996.0615090424. The cubic root of 728787337 is about 899.9124758508.

The spelling of 728787337 in words is "seven hundred twenty-eight million, seven hundred eighty-seven thousand, three hundred thirty-seven".