71278002 has 16 divisors (see below), whose sum is σ = 158395680. Its totient is φ = 23759316.

The previous prime is 71278001. The next prime is 71278013. The reversal of 71278002 is 20087217.

It is a super-2 number, since 2×71278002² = 10161107138224008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (71278001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659928 + ... + 660035.

It is an arithmetic number, because the mean of its divisors is an integer number (9899730).

Almost surely, 2^71278002 is an apocalyptic number.

71278002 is an abundant number, since it is smaller than the sum of its proper divisors (87117678).

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

71278002 is a wasteful number, since it uses less digits than its factorization.

71278002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319974 (or 1319968 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 71278002 is about 8442.6300404554. The cubic root of 71278002 is about 414.6215197393.

It can be divided in two parts, 7127 and 8002, that added together give a square (15129 = 123²).

The spelling of 71278002 in words is "seventy-one million, two hundred seventy-eight thousand, two".