1455951978 has 48 divisors (see below), whose sum is σ = 3597067656. Its totient is φ = 421632000.

The previous prime is 1455951977. The next prime is 1455952033. The reversal of 1455951978 is 8791595541.

It is a happy number.

1455951978 is a `hidden beast` number, since 1 + 4 + 5 + 59 + 519 + 78 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1276847289 + 179104689 = 35733^2 + 13383^2 .

It is a super-2 number, since 2×1455951978² = 4239592324484224968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1455951971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179023 + ... + 186978.

Almost surely, 2^1455951978 is an apocalyptic number.

1455951978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1455951978 is an abundant number, since it is smaller than the sum of its proper divisors (2141115678).

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

1455951978 is a wasteful number, since it uses less digits than its factorization.

1455951978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366039 (or 366036 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 54.

The square root of 1455951978 is about 38156.9387923088. The cubic root of 1455951978 is about 1133.3977607165.

The spelling of 1455951978 in words is "one billion, four hundred fifty-five million, nine hundred fifty-one thousand, nine hundred seventy-eight".