155400340 has 12 divisors (see below), whose sum is σ = 326340756. Its totient is φ = 62160128.

The previous prime is 155400337. The next prime is 155400353. The reversal of 155400340 is 43004551.

It can be written as a sum of positive squares in 2 ways, for example, as 106791556 + 48608784 = 10334^2 + 6972^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3884989 + ... + 3885028.

It is an arithmetic number, because the mean of its divisors is an integer number (27195063).

Almost surely, 2^155400340 is an apocalyptic number.

155400340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155400340 is an abundant number, since it is smaller than the sum of its proper divisors (170940416).

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

155400340 is a wasteful number, since it uses less digits than its factorization.

155400340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7770026 (or 7770024 counting only the distinct ones).

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

The square root of 155400340 is about 12465.9672709341. The cubic root of 155400340 is about 537.6306111293.

Adding to 155400340 its reverse (43004551), we get a palindrome (198404891).

The spelling of 155400340 in words is "one hundred fifty-five million, four hundred thousand, three hundred forty".