54778746 has 32 divisors (see below), whose sum is σ = 119802816. Its totient is φ = 16560000.

The previous prime is 54778741. The next prime is 54778751. The reversal of 54778746 is 64787745.

It is an interprime number because it is at equal distance from previous prime (54778741) and next prime (54778751).

It is a super-2 number, since 2×54778746² = 6001422026665032, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 54778695 and 54778704.

It is not an unprimeable number, because it can be changed into a prime (54778741) 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, 38976 + ... + 40356.

It is an arithmetic number, because the mean of its divisors is an integer number (3743838).

Almost surely, 2^54778746 is an apocalyptic number.

54778746 is an abundant number, since it is smaller than the sum of its proper divisors (65024070).

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

54778746 is a wasteful number, since it uses less digits than its factorization.

54778746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998.

The product of its digits is 1317120, while the sum is 48.

The square root of 54778746 is about 7401.2665132395. The cubic root of 54778746 is about 379.7846101621.

The spelling of 54778746 in words is "fifty-four million, seven hundred seventy-eight thousand, seven hundred forty-six".