155408946 has 64 divisors (see below), whose sum is σ = 389007360. Its totient is φ = 40210560.

The previous prime is 155408899. The next prime is 155408947. The reversal of 155408946 is 649804551.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155408898 and 155408907.

It is not an unprimeable number, because it can be changed into a prime (155408947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165390 + ... + 166326.

It is an arithmetic number, because the mean of its divisors is an integer number (6078240).

Almost surely, 2^155408946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155408946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194503680).

155408946 is an abundant number, since it is smaller than the sum of its proper divisors (233598414).

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

155408946 is a wasteful number, since it uses less digits than its factorization.

155408946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 155408946 is about 12466.3124459481. The cubic root of 155408946 is about 537.6405355255.

The spelling of 155408946 in words is "one hundred fifty-five million, four hundred eight thousand, nine hundred forty-six".