155447994 has 32 divisors (see below), whose sum is σ = 335309184. Its totient is φ = 47759040.

The previous prime is 155447977. The next prime is 155448071. The reversal of 155447994 is 499744551.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79452 + ... + 81384.

It is an arithmetic number, because the mean of its divisors is an integer number (10478412).

Almost surely, 2^155447994 is an apocalyptic number.

155447994 is an abundant number, since it is smaller than the sum of its proper divisors (179861190).

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

155447994 is a wasteful number, since it uses less digits than its factorization.

155447994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982.

The product of its digits is 907200, while the sum is 48.

The square root of 155447994 is about 12467.8784883395. The cubic root of 155447994 is about 537.6855608820.

The spelling of 155447994 in words is "one hundred fifty-five million, four hundred forty-seven thousand, nine hundred ninety-four".