7830451478 has 4 divisors (see below), whose sum is σ = 11745677220. Its totient is φ = 3915225738.

The previous prime is 7830451471. The next prime is 7830451529. The reversal of 7830451478 is 8741540387.

It is a happy number.

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

It is a super-2 number, since 2×7830451478² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7830451471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957612868 + ... + 1957612871.

It is an arithmetic number, because the mean of its divisors is an integer number (2936419305).

Almost surely, 2^7830451478 is an apocalyptic number.

7830451478 is a deficient number, since it is larger than the sum of its proper divisors (3915225742).

7830451478 is a wasteful number, since it uses less digits than its factorization.

7830451478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915225741.

The product of its (nonzero) digits is 752640, while the sum is 47.

The square root of 7830451478 is about 88489.8382753636. The cubic root of 7830451478 is about 1985.7699494561.

The spelling of 7830451478 in words is "seven billion, eight hundred thirty million, four hundred fifty-one thousand, four hundred seventy-eight".