1155700978 has 4 divisors (see below), whose sum is σ = 1733551470. Its totient is φ = 577850488.

The previous prime is 1155700963. The next prime is 1155700979. The reversal of 1155700978 is 8790075511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 724847929 + 430853049 = 26923^2 + 20757^2 .

It is not an unprimeable number, because it can be changed into a prime (1155700979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288925243 + ... + 288925246.

Almost surely, 2^1155700978 is an apocalyptic number.

1155700978 is a deficient number, since it is larger than the sum of its proper divisors (577850492).

1155700978 is an equidigital number, since it uses as much as digits as its factorization.

1155700978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577850491.

The product of its (nonzero) digits is 88200, while the sum is 43.

The square root of 1155700978 is about 33995.6023332430. The cubic root of 1155700978 is about 1049.4179625334.

The spelling of 1155700978 in words is "one billion, one hundred fifty-five million, seven hundred thousand, nine hundred seventy-eight".