1388800157 has 2 divisors, whose sum is σ = 1388800158. Its totient is φ = 1388800156.

The previous prime is 1388800151. The next prime is 1388800183. The reversal of 1388800157 is 7510088831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1218079801 + 170720356 = 34901^2 + 13066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1388800157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1388800151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694400078 + 694400079.

It is an arithmetic number, because the mean of its divisors is an integer number (694400079).

Almost surely, 2^1388800157 is an apocalyptic number.

It is an amenable number.

1388800157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1388800157 is an equidigital number, since it uses as much as digits as its factorization.

1388800157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 41.

The square root of 1388800157 is about 37266.6091427702. The cubic root of 1388800157 is about 1115.6978229442.

Adding to 1388800157 its reverse (7510088831), we get a palindrome (8898888988).

The spelling of 1388800157 in words is "one billion, three hundred eighty-eight million, eight hundred thousand, one hundred fifty-seven".