1078420690 has 8 divisors (see below), whose sum is σ = 1941157260. Its totient is φ = 431368272.

The previous prime is 1078420669. The next prime is 1078420723. The reversal of 1078420690 is 960248701.

It can be written as a sum of positive squares in 2 ways, for example, as 1039869009 + 38551681 = 32247^2 + 6209^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1078420690² = 2325982369240152200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53921025 + ... + 53921044.

Almost surely, 2^1078420690 is an apocalyptic number.

1078420690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1078420690 is a deficient number, since it is larger than the sum of its proper divisors (862736570).

1078420690 is a wasteful number, since it uses less digits than its factorization.

1078420690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107842076.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 1078420690 is about 32839.3162230884. The cubic root of 1078420690 is about 1025.4852162360.

The spelling of 1078420690 in words is "one billion, seventy-eight million, four hundred twenty thousand, six hundred ninety".