1954465978 has 32 divisors (see below), whose sum is σ = 3041737920. Its totient is φ = 941381760.

The previous prime is 1954465973. The next prime is 1954466051. The reversal of 1954465978 is 8795644591.

It is a super-3 number, since 3×1954465978³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1954465973) 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, 1841568 + ... + 1842628.

It is an arithmetic number, because the mean of its divisors is an integer number (95054310).

Almost surely, 2^1954465978 is an apocalyptic number.

1954465978 is a deficient number, since it is larger than the sum of its proper divisors (1087271942).

1954465978 is a wasteful number, since it uses less digits than its factorization.

1954465978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422.

The product of its digits is 10886400, while the sum is 58.

The square root of 1954465978 is about 44209.3426551447. The cubic root of 1954465978 is about 1250.2860098604.

The spelling of 1954465978 in words is "one billion, nine hundred fifty-four million, four hundred sixty-five thousand, nine hundred seventy-eight".