152191394 has 8 divisors (see below), whose sum is σ = 228726828. Its totient is φ = 75949120.

The previous prime is 152191393. The next prime is 152191399. The reversal of 152191394 is 493191251.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 150970369 + 1221025 = 12287^2 + 1105^2 .

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

It is not an unprimeable number, because it can be changed into a prime (152191393) 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, 71987 + ... + 74070.

Almost surely, 2^152191394 is an apocalyptic number.

152191394 is a deficient number, since it is larger than the sum of its proper divisors (76535434).

152191394 is a wasteful number, since it uses less digits than its factorization.

152191394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146580.

The product of its digits is 9720, while the sum is 35.

The square root of 152191394 is about 12336.5876157064. The cubic root of 152191394 is about 533.9042340669.

The spelling of 152191394 in words is "one hundred fifty-two million, one hundred ninety-one thousand, three hundred ninety-four".