78275450 has 24 divisors (see below), whose sum is σ = 158829120. Its totient is φ = 28463600.

The previous prime is 78275423. The next prime is 78275471. The reversal of 78275450 is 5457287.

It is a super-2 number, since 2×78275450² = 12254092145405000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70610 + ... + 71709.

It is an arithmetic number, because the mean of its divisors is an integer number (6617880).

Almost surely, 2^78275450 is an apocalyptic number.

78275450 is an abundant number, since it is smaller than the sum of its proper divisors (80553670).

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

78275450 is a wasteful number, since it uses less digits than its factorization.

78275450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142342 (or 142337 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 78275450 is about 8847.3414085815. The cubic root of 78275450 is about 427.7682276436.

The spelling of 78275450 in words is "seventy-eight million, two hundred seventy-five thousand, four hundred fifty".