155730402 has 12 divisors (see below), whose sum is σ = 337415910. Its totient is φ = 51910128.

The previous prime is 155730383. The next prime is 155730413. The reversal of 155730402 is 204037551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 146676321 + 9054081 = 12111^2 + 3009^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4325827 + ... + 4325862.

Almost surely, 2^155730402 is an apocalyptic number.

155730402 is an abundant number, since it is smaller than the sum of its proper divisors (181685508).

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

155730402 is a wasteful number, since it uses less digits than its factorization.

155730402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8651697 (or 8651694 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 155730402 is about 12479.1987723571. The cubic root of 155730402 is about 538.0109748410.

Adding to 155730402 its reverse (204037551), we get a palindrome (359767953).

It can be divided in two parts, 1 and 55730402, that added together give a triangular number (55730403 = T₁₀₅₅₇).

The spelling of 155730402 in words is "one hundred fifty-five million, seven hundred thirty thousand, four hundred two".