5451978 has 32 divisors (see below), whose sum is σ = 12533760. Its totient is φ = 1548720.

The previous prime is 5451961. The next prime is 5452009. The reversal of 5451978 is 8791545.

It is a super-2 number, since 2×5451978² = 59448128224968, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11143 + ... + 11621.

It is an arithmetic number, because the mean of its divisors is an integer number (391680).

Almost surely, 2^5451978 is an apocalyptic number.

5451978 is an abundant number, since it is smaller than the sum of its proper divisors (7081782).

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

5451978 is a wasteful number, since it uses less digits than its factorization.

5451978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762.

The product of its digits is 50400, while the sum is 39.

The square root of 5451978 is about 2334.9471086087. The cubic root of 5451978 is about 176.0021736990.

The spelling of 5451978 in words is "five million, four hundred fifty-one thousand, nine hundred seventy-eight".