878250749 has 4 divisors (see below), whose sum is σ = 878567100. Its totient is φ = 877934400.

The previous prime is 878250743. The next prime is 878250767. The reversal of 878250749 is 947052878.

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

It can be written as a sum of positive squares in 2 ways, for example, as 321054724 + 557196025 = 17918^2 + 23605^2 .

It is a cyclic number.

It is not a de Polignac number, because 878250749 - 2¹⁶ = 878185213 is a prime.

It is a super-2 number, since 2×878250749² = 1542648756238122002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 878250697 and 878250706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878250743) 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, 153974 + ... + 159575.

It is an arithmetic number, because the mean of its divisors is an integer number (219641775).

Almost surely, 2^878250749 is an apocalyptic number.

It is an amenable number.

878250749 is a deficient number, since it is larger than the sum of its proper divisors (316351).

878250749 is a wasteful number, since it uses less digits than its factorization.

878250749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316350.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 878250749 is about 29635.2956624360. The cubic root of 878250749 is about 957.6485959891.

The spelling of 878250749 in words is "eight hundred seventy-eight million, two hundred fifty thousand, seven hundred forty-nine".