1087978 has 8 divisors (see below), whose sum is σ = 1717920. Its totient is φ = 515340.

The previous prime is 1087973. The next prime is 1087981. The reversal of 1087978 is 8797801.

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

It is a super-2 number, since 2×1087978² = 2367392256968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1087978.

It is not an unprimeable number, because it can be changed into a prime (1087973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14278 + ... + 14353.

It is an arithmetic number, because the mean of its divisors is an integer number (214740).

2^1087978 is an apocalyptic number.

1087978 is a deficient number, since it is larger than the sum of its proper divisors (629942).

1087978 is a wasteful number, since it uses less digits than its factorization.

1087978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28652.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 1087978 is about 1043.0618390105. The cubic root of 1087978 is about 102.8505703840.

The spelling of 1087978 in words is "one million, eighty-seven thousand, nine hundred seventy-eight".