153990938 has 8 divisors (see below), whose sum is σ = 232458132. Its totient is φ = 76504896.

The previous prime is 153990931. The next prime is 153990961. The reversal of 153990938 is 839099351.

It can be written as a sum of positive squares in 2 ways, for example, as 131171209 + 22819729 = 11453^2 + 4777^2 .

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

It is a super-2 number, since 2×153990938² = 47426417972239688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 153990892 and 153990901.

It is not an unprimeable number, because it can be changed into a prime (153990931) 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, 244895 + ... + 245522.

Almost surely, 2^153990938 is an apocalyptic number.

153990938 is a deficient number, since it is larger than the sum of its proper divisors (78467194).

153990938 is a wasteful number, since it uses less digits than its factorization.

153990938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490576.

The product of its (nonzero) digits is 262440, while the sum is 47.

The square root of 153990938 is about 12409.3085222344. The cubic root of 153990938 is about 536.0003271885. Note that the first 3 decimals are identical.

The spelling of 153990938 in words is "one hundred fifty-three million, nine hundred ninety thousand, nine hundred thirty-eight".