212878480 has 40 divisors (see below), whose sum is σ = 495628992. Its totient is φ = 85033344.

The previous prime is 212878453. The next prime is 212878487. The reversal of 212878480 is 84878212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×212878480² = 90634494494220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (212878487) 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, 77287 + ... + 79993.

Almost surely, 2^212878480 is an apocalyptic number.

212878480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212878480 is an abundant number, since it is smaller than the sum of its proper divisors (282750512).

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

212878480 is a wasteful number, since it uses less digits than its factorization.

212878480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703 (or 3697 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 212878480 is about 14590.3557187616. The cubic root of 212878480 is about 597.0956678117.

It can be divided in two parts, 2128 and 78480, that added together give a palindrome (80608).

The spelling of 212878480 in words is "two hundred twelve million, eight hundred seventy-eight thousand, four hundred eighty".