157769728 has 28 divisors (see below), whose sum is σ = 315536580. Its totient is φ = 78880768.

The previous prime is 157769723. The next prime is 157769737. The reversal of 157769728 is 827967751.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157769723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1438 + ... + 17821.

Almost surely, 2^157769728 is an apocalyptic number.

It is an amenable number.

157769728 is a deficient number, since it is larger than the sum of its proper divisors (157766852).

157769728 is an frugal number, since it uses more digits than its factorization.

157769728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19285 (or 19261 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 52.

The square root of 157769728 is about 12560.6420218076. The cubic root of 157769728 is about 540.3492573716.

The spelling of 157769728 in words is "one hundred fifty-seven million, seven hundred sixty-nine thousand, seven hundred twenty-eight".