157730079 has 16 divisors (see below), whose sum is σ = 230200544. Its totient is φ = 95472000.

The previous prime is 157730071. The next prime is 157730081. The reversal of 157730079 is 970037751.

It is a happy number.

It is not a de Polignac number, because 157730079 - 2³ = 157730071 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157730071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30772 + ... + 35529.

It is an arithmetic number, because the mean of its divisors is an integer number (14387534).

Almost surely, 2^157730079 is an apocalyptic number.

157730079 is a deficient number, since it is larger than the sum of its proper divisors (72470465).

157730079 is a wasteful number, since it uses less digits than its factorization.

157730079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66378.

The product of its (nonzero) digits is 46305, while the sum is 39.

The square root of 157730079 is about 12559.0636195538. The cubic root of 157730079 is about 540.3039886479.

It can be divided in two parts, 157 and 730079, that added together give a triangular number (730236 = T₁₂₀₈).

The spelling of 157730079 in words is "one hundred fifty-seven million, seven hundred thirty thousand, seventy-nine".