155890349 has 8 divisors (see below), whose sum is σ = 157819200. Its totient is φ = 153968256.

The previous prime is 155890309. The next prime is 155890363. The reversal of 155890349 is 943098551.

It is a happy number.

155890349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 155890349 - 2¹⁶ = 155824813 is a prime.

It is a super-2 number, since 2×155890349² = 48603601822683602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155890309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56762 + ... + 59444.

It is an arithmetic number, because the mean of its divisors is an integer number (19727400).

Almost surely, 2^155890349 is an apocalyptic number.

It is an amenable number.

155890349 is a deficient number, since it is larger than the sum of its proper divisors (1928851).

155890349 is an equidigital number, since it uses as much as digits as its factorization.

155890349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 155890349 is about 12485.6056721330. The cubic root of 155890349 is about 538.1951045849.

The spelling of 155890349 in words is "one hundred fifty-five million, eight hundred ninety thousand, three hundred forty-nine".