2102787078 has 24 divisors (see below), whose sum is σ = 4892199192. Its totient is φ = 600796224.

The previous prime is 2102787077. The next prime is 2102787079. The reversal of 2102787078 is 8707872012.

It is an interprime number because it is at equal distance from previous prime (2102787077) and next prime (2102787079).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102787077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3575875 + ... + 3576462.

It is an arithmetic number, because the mean of its divisors is an integer number (203841633).

Almost surely, 2^2102787078 is an apocalyptic number.

2102787078 is an abundant number, since it is smaller than the sum of its proper divisors (2789412114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2102787078 is a wasteful number, since it uses less digits than its factorization.

2102787078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7152356 (or 7152349 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 42.

The square root of 2102787078 is about 45856.1563805777. The cubic root of 2102787078 is about 1281.1454342330.

The spelling of 2102787078 in words is "two billion, one hundred two million, seven hundred eighty-seven thousand, seventy-eight".