155208040 has 32 divisors (see below), whose sum is σ = 376082280. Its totient is φ = 57307392.

The previous prime is 155208037. The next prime is 155208073. The reversal of 155208040 is 40802551.

It can be written as a sum of positive squares in 4 ways, for example, as 141562404 + 13645636 = 11898^2 + 3694^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155207996 and 155208014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148719 + ... + 149758.

Almost surely, 2^155208040 is an apocalyptic number.

155208040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155208040 is an abundant number, since it is smaller than the sum of its proper divisors (220874240).

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

155208040 is a wasteful number, since it uses less digits than its factorization.

155208040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298501 (or 298497 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 155208040 is about 12458.2518837917. The cubic root of 155208040 is about 537.4087560999.

The spelling of 155208040 in words is "one hundred fifty-five million, two hundred eight thousand, forty".