137978022 has 72 divisors (see below), whose sum is σ = 347727816. Its totient is φ = 36376704.

The previous prime is 137978017. The next prime is 137978039. The reversal of 137978022 is 220879731.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a zygodrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 48298 + ... + 51074.

It is an arithmetic number, because the mean of its divisors is an integer number (4829553).

Almost surely, 2^137978022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 137978022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173863908).

137978022 is an abundant number, since it is smaller than the sum of its proper divisors (209749794).

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

137978022 is a wasteful number, since it uses less digits than its factorization.

137978022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822 (or 2802 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 137978022 is about 11746.4046414211. The cubic root of 137978022 is about 516.7374903028.

It can be divided in two parts, 1379 and 78022, that added together give a triangular number (79401 = T₃₉₈).

The spelling of 137978022 in words is "one hundred thirty-seven million, nine hundred seventy-eight thousand, twenty-two".