155774740 has 48 divisors (see below), whose sum is σ = 377866944. Its totient is φ = 53312000.

The previous prime is 155774719. The next prime is 155774743. The reversal of 155774740 is 47477551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 155774693 and 155774702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155774743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17086 + ... + 24565.

It is an arithmetic number, because the mean of its divisors is an integer number (7872228).

Almost surely, 2^155774740 is an apocalyptic number.

155774740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155774740 is an abundant number, since it is smaller than the sum of its proper divisors (222092204).

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

155774740 is a wasteful number, since it uses less digits than its factorization.

155774740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41688 (or 41686 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 40.

The square root of 155774740 is about 12480.9751221609. The cubic root of 155774740 is about 538.0620290278.

The spelling of 155774740 in words is "one hundred fifty-five million, seven hundred seventy-four thousand, seven hundred forty".