155402044 has 12 divisors (see below), whose sum is σ = 310804144. Its totient is φ = 66600864.

The previous prime is 155402041. The next prime is 155402057. The reversal of 155402044 is 440204551.

It is a happy number.

155402044 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155402041) 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, 2775009 + ... + 2775064.

Almost surely, 2^155402044 is an apocalyptic number.

155402044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

155402044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

155402044 is a wasteful number, since it uses less digits than its factorization.

155402044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5550084 (or 5550082 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 155402044 is about 12466.0356168270. The cubic root of 155402044 is about 537.6325762027.

Adding to 155402044 its reverse (440204551), we get a palindrome (595606595).

The spelling of 155402044 in words is "one hundred fifty-five million, four hundred two thousand, forty-four".