155340040 has 16 divisors (see below), whose sum is σ = 349515180. Its totient is φ = 62136000.

The previous prime is 155340019. The next prime is 155340041. The reversal of 155340040 is 40043551.

It can be written as a sum of positive squares in 2 ways, for example, as 142134084 + 13205956 = 11922^2 + 3634^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155339993 and 155340020.

It is not an unprimeable number, because it can be changed into a prime (155340041) 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, 1941711 + ... + 1941790.

Almost surely, 2^155340040 is an apocalyptic number.

155340040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155340040 is an abundant number, since it is smaller than the sum of its proper divisors (194175140).

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

155340040 is a wasteful number, since it uses less digits than its factorization.

155340040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3883512 (or 3883508 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 155340040 is about 12463.5484513841. The cubic root of 155340040 is about 537.5610631906.

Adding to 155340040 its reverse (40043551), we get a palindrome (195383591).

The spelling of 155340040 in words is "one hundred fifty-five million, three hundred forty thousand, forty".