155783040 has 256 divisors, whose sum is σ = 579294720. Its totient is φ = 34873344.

The previous prime is 155783039. The next prime is 155783057. The reversal of 155783040 is 40387551.

It is a junction number, because it is equal to n+sod(n) for n = 155782992 and 155783010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 900394 + ... + 900566.

It is an arithmetic number, because the mean of its divisors is an integer number (2262870).

Almost surely, 2^155783040 is an apocalyptic number.

155783040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155783040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289647360).

155783040 is an abundant number, since it is smaller than the sum of its proper divisors (423511680).

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

155783040 is a wasteful number, since it uses less digits than its factorization.

155783040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 155783040 is about 12481.3076238029. The cubic root of 155783040 is about 538.0715852102.

The spelling of 155783040 in words is "one hundred fifty-five million, seven hundred eighty-three thousand, forty".