145451808 has 48 divisors (see below), whose sum is σ = 424236960. Its totient is φ = 48483648.

The previous prime is 145451777. The next prime is 145451819. The reversal of 145451808 is 808154541.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83310 + ... + 85037.

It is an arithmetic number, because the mean of its divisors is an integer number (8838270).

Almost surely, 2^145451808 is an apocalyptic number.

145451808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

145451808 is an abundant number, since it is smaller than the sum of its proper divisors (278785152).

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

145451808 is a wasteful number, since it uses less digits than its factorization.

145451808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168366 (or 168352 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 145451808 is about 12060.3402937065. The cubic root of 145451808 is about 525.9038796541.

The spelling of 145451808 in words is "one hundred forty-five million, four hundred fifty-one thousand, eight hundred eight".