70209072 has 80 divisors (see below), whose sum is σ = 202546560. Its totient is φ = 23284800.

The previous prime is 70209049. The next prime is 70209101. The reversal of 70209072 is 27090207.

It is a super-2 number, since 2×70209072² = 9858627582202368, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142747 + ... + 143237.

It is an arithmetic number, because the mean of its divisors is an integer number (2531832).

Almost surely, 2^70209072 is an apocalyptic number.

70209072 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70209072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101273280).

70209072 is an abundant number, since it is smaller than the sum of its proper divisors (132337488).

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

70209072 is a wasteful number, since it uses less digits than its factorization.

70209072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 70209072 is about 8379.0853916164. The cubic root of 70209072 is about 412.5384294776.

Adding to 70209072 its reverse (27090207), we get a palindrome (97299279).

The spelling of 70209072 in words is "seventy million, two hundred nine thousand, seventy-two".