155990292 has 12 divisors (see below), whose sum is σ = 363977376. Its totient is φ = 51996760.

The previous prime is 155990291. The next prime is 155990293. The reversal of 155990292 is 292099551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (155990291) and next prime (155990293).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155990291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6499584 + ... + 6499607.

It is an arithmetic number, because the mean of its divisors is an integer number (30331448).

Almost surely, 2^155990292 is an apocalyptic number.

155990292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

155990292 is an abundant number, since it is smaller than the sum of its proper divisors (207987084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155990292 is a wasteful number, since it uses less digits than its factorization.

155990292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12999198 (or 12999196 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 155990292 is about 12489.6073597211. The cubic root of 155990292 is about 538.3100942617.

The spelling of 155990292 in words is "one hundred fifty-five million, nine hundred ninety thousand, two hundred ninety-two".