2134578690 has 32 divisors (see below), whose sum is σ = 5692210560. Its totient is φ = 569220912.

The previous prime is 2134578689. The next prime is 2134578697. The reversal of 2134578690 is 968754312.

2134578690 is a `hidden beast` number, since 2 + 13 + 4 + 578 + 69 + 0 = 666.

2134578690 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2134578690² = 9112852367604232200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

2134578690 is strictly pandigital in base 10.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2134578697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3952654 + ... + 3953193.

It is an arithmetic number, because the mean of its divisors is an integer number (177881580).

It is a 2-persistent number, because it is pandigital, and so is 2⋅2134578690 = 4269157380, but 3⋅2134578690 = 6403736070 is not.

Almost surely, 2^2134578690 is an apocalyptic number.

2134578690 is an abundant number, since it is smaller than the sum of its proper divisors (3557631870).

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

2134578690 is a wasteful number, since it uses less digits than its factorization.

2134578690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7905863 (or 7905857 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 2134578690 is about 46201.5009496445. The cubic root of 2134578690 is about 1287.5696262972.

The spelling of 2134578690 in words is "two billion, one hundred thirty-four million, five hundred seventy-eight thousand, six hundred ninety".